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Small square 4 cm server cooling fan with black frame and three-wire connector

Fans

Fans 1611KL-04W-B49 4CM 12V 4028 0.26A 3 wire server cooling fan

SKU CH-D8FB-23YGC

A 4 cm server cooling fan running on 12 V with a three-wire connection and 0.26 A draw

  • Compact 4 cm frame fits tight server chassis
  • 12 V 0.26 A draw keeps power budget low
  • Three-wire connection enables speed monitoring
  • NMB 1611KL-04W-B49 model built for continuous operation

Compact 4 cm server fan

The NMB 1611KL-04W-B49 is a 4 cm case fan built for server and industrial enclosures. It runs on 12 V and uses a three-wire connection for speed monitoring. The 4028 frame size fits tight rack-mount spaces where airflow must be directed through dense component layouts.

Suited for dense rack builds

This fan suits administrators who need a low-profile 12 V cooler with tachometer feedback for managed chassis. It is not intended for desktop cases that require larger diameter fans or PWM control, nor for builds that demand higher static pressure than a 4 cm frame can deliver.

How it compares

Measured against everything we stock in PC Cooling Fans, at today’s prices. Recalculated every night.

Price $16.99
Cheaper than about 60% of the 8,339 comparable items (median $19.99).

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Specifications

No published specifications for this item yet.

Questions about this item

How do I connect the 3-wire lead to a 12 V fan header, and which pin is often missed?

Align the three pins with the header — ground, 12 V, and tachometer — and press straight down; the tachometer pin is the one most often left offset, so the fan spins but speed reporting fails.

What maintenance does the 1611KL-04W-B49 need, and when should I plan a replacement?

Blow dust from the 4028 frame and blades every few months; if bearing noise appears or the 0.26 A draw becomes erratic, swap the unit — no lubrication service is possible.

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